54 PROCEEDINGS OF THE ACADEMY OF [Part I 



ingly in the coloration and very peculiar structure of the male hy- 

 popygium. 



Rbipidia (Conorhipidia) punctipennis Alexander. 



1914. Rhipidia (Conorhipidia) punctipennis Alexander, Journ. N. Y. Ent. 

 Soc, vol. 22, pp. 117, 118. 



A large female which may represent a new race of this species 



was taken at Iquitos, Peru, May 15, 1920 (H. S. Parish). The 



typical form has not been found outside of Costa Rica. 



Rhipidia (Arhipidia) annulicomis Enderlein. 



1912. Rhipidia annulicomis Enderlein, Zool. Jahrb. Syst., vol. 32, pp. 

 80, 81. 



Sex? Napo River, Peru, June 8, 1920 (H. S. Parish). 



Rhipidia (Arhipidia) domestica amazonensis Alexander. 



1912. Rhipidia domestica amazonensis Alexander, Bull. Brooklyn Ent. Soc, 

 vol. 8, p. 17. 



Teffe, Brazil, December 25, 1919 (H. S. Parish). 

 Napo River, Peru, June 9-15, 1920 (H. S. Parish). 



Rhipidia (Arhipidia) domestica angustifrons Alexander. 



1912. Rhipidia domestica angustifrons Alexander, Bull. Brooklyn Ent. Soc, 

 vol. 8, pp. 16, 17. 



Napo River, Peru, June 9-12, 1920 (H. S. Parish). 

 The pectinations on the male antennae are distinctly longer than 

 in typical domestica. 



Genus RHAMPHIDIA Melgen. 

 1830. Rhamphidia Meigen, Syst. Beschr., vol. 6, p. 281. 



Rhamphidia miranda sp. ti. 



General coloration reddish yellow; wings grayish subhyaline with 

 a conspicuous brown band along the cord; cell Rx long and narrow; 

 cell 1st Mi rectangular, the basal deflection of Cui beyond the fork 

 of M; male hypopygium with the shortest pleural appendage pro- 

 duced into a simple curved hook. 



Male. — Length about 5.5 mm.; wing 5.2-5.6 mm. 

 Female. — Length 6.7 mm.; wing 5.4 mm. 



Rostrum about as long as the remainder of the head, pale brown- 

 ish yellow; palpi short, dark brown. Antennae short, light brown; 

 flagellar segments elongate-cylindrical with very long verticils. 

 Head light gray. Mesonotum reddish yellow without markings. 

 Pleura slightly darker. Halteres pale, the knobs brown. Legs 

 with the coxae and trochanters reddish yellow; remainder of the 

 legs pale testaceous, the terminal tarsal segments slightly darker. 

 Wings grayish subhyaline, cells C and *Sc more yellowish; stigma 

 oval, brown, occupying the middle portion of cell Rx and the distal 

 end of cell *Sc,; from the stigma a broad but ill-defined band con- 



